2000 SUZUKI GRAND VITARA ect

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-7
GENERAL PRECAUTIONS
The WARNING and CAUTION below describe some general precautions that you should observe when servicing
a vehicle. These general precautions apply to many of the service procedures described in this manual, and they
will not necessarily be repeated with each procedure to which they apply.
WARNING:

Whenever raising a vehicle for service, be sure to follow the instructions under ªVEHICLE LIFTING
POINTSº on SECTION 0A.

When it is necessary to do service work with the engine running, make sure that the parking brake
is set fully and the transmission is in Neutral (for manual transmission vehicles) or Park (for automatic
transmission vehicles). Keep hands, hair, clothing, tools, etc. away from the fan and belts when the
engine is running.

When it is necessary to run the engine indoors, make sure that the exhaust gas is forced outdoors.

Do not perform service work in areas where combustible materials can come in contact with a hot
exhaust system. When working with toxic or flammable materials (such as gasoline and refrigerant),
make sure that the area you work in is well-ventilated.

To avoid getting burned, keep away from hot metal parts such as the radiator, exhaust manifold, tail-
pipe, muffler, etc.

New and used engine oil can be hazardous. Children and pets may be harmed by swallowing new or
used oil. Keep new and used oil and used engine oil filters away from children and pets.
Continuous contact with used engine oil has been found to cause [skin] cancer in laboratory animals.
Brief contact with used oil may irritate skin. To minimize your exposure to used engine oil, wear a
long-sleeve shirt and moisture-proof gloves (such as dishwashing gloves) when changing engine oil.
If engine oil contacts your skin, wash thoroughly with soap and water. Launder any clothing or rags
if wet with oil, recycle or properly dispose of used oil and filters.

Make sure the bonnet is fully closed and latched before driving. If it is not, it can fly up unexpectedly
during driving, obstructing your view and resulting in an accident.
CAUTION:

Before starting any service work, cover fenders, seats and
any other parts that are likely to get scratched or stained dur-
ing servicing. Also, be aware that what you wear (e.g, but-
tons) may cause damage to the vehicle's finish.

When performing service to electrical parts that does not re-
quire use of battery power, disconnect the negative cable of
the battery.

YH4
GRAND
VITARA
ªAº
0A-8 GENERAL INFORMATION

When removing the battery, be sure to disconnect the nega-
tive cable first and then the positive cable. When reconnect-
ing the battery, connect the positive cable first and then the
negative cable, and replace the terminal cover.

When removing parts that are to be reused, be sure to keep
them arranged in an orderly manner so that they may be rein-
stalled in the proper order and position.

Whenever you use oil seals, gaskets, packing, O-rings, lock-
ing washers, split pins, self-locking nuts, and certain other
parts as specified, be sure to use new ones. Also, before
installing new gaskets, packing, etc., be sure to remove any
residual material from the mating surfaces.

Make sure that all parts used in reassembly are perfectly
clean.

When use of a certain type of lubricant, bond or sealant is
specified, be sure to use the specified type.
ªAº: Sealant 99000-31150

Be sure to use special tools when instructed.
Special Tool
(A): 09917-98221
(B): 09916-58210

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-9

When disconnecting vacuum hoses, attach a tag describing
the correct installation positions so that the hoses can be re-
installed correctly.

After servicing fuel, oil, coolant, vacuum, exhaust or brake
systems, check all lines related to the system for leaks.

For vehicles equipped with fuel injection systems, never dis-
connect the fuel line between the fuel pump and injector
without first releasing the fuel pressure, or fuel can be
sprayed out under pressure.
PRECAUTIONS FOR CATALYTIC CONVERTER
For vehicles equipped with a catalytic converter, use only un-
leaded gasoline and be careful not to let a large amount of un-
burned gasoline enter the converter or it can be damaged.
± Conduct a spark jump test only when necessary, make it as
short as possible, and do not open the throttle.
± Conduct engine compression checks within the shortest
possible time.
± Avoid situations which can result in engine misfire (e.g.
starting the engine when the fuel tank is nearly empty).

YH4
GRAND
VITARA
1. Coupler
2. Probe
1. Coupler
2. Probe
3. Where male
terminal fits
0A-10 GENERAL INFORMATION
PRECAUTIONS FOR ELECTRICAL CIRCUIT
SERVICE

When disconnecting and connecting coupler, make sure to
turn ignition switch OFF, or electronic parts may get dam-
aged.

Be careful not to touch the electrical terminals of parts which
use microcomputers (e.g. electronic control unit like as
ECM, PCM, P/S controller, etc.). The static electricity from
your body can damage these parts.

Never connect any tester (voltmeter, ohmmeter, or whatever)
to electronic control unit when its coupler is disconnected.
Attempt to do it may cause damage to it.

Never connect an ohmmeter to electronic control unit with
its coupler connected to it. Attempt to do it may cause dam-
age to electronic control unit and sensors.

Be sure to use a specified voltmeter / ohmmeter. Otherwise,
accurate measurements may not be obtained or personal in-
jury may result.

When taking measurements at electrical connectors using a
tester probe, be sure to insert the probe from the wire har-
ness side (backside) of the connector.

When connecting meter probe from terminal side of coupler
because it can't be connected from harness side, use extra
care not to bend male terminal of coupler of force its female
terminal open for connection.
In case of such coupler as shown connect probe as shown
to avoid opening female terminal.
Never connect probe where male terminal is supposed to fit.

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-11

When checking connection of terminals, check its male half
for bend and female half for excessive opening and both for
locking (looseness), corrosion, dust, etc.

Before measuring voltage at each terminal, check to make
sure that battery voltage is 11V or higher. Such terminal volt-
age check at low battery voltage will lead to erroneous diag-
nosis.

YH4
GRAND
VITARA
0A-12 GENERAL INFORMATION
1. Check for loose connectionSensor
ECM
Check contact tension by
Inserting and removing just for
once
1. Looseness of crimping
2. Open
3. Thin wire (Single strand of wire)
ELECTRICAL CIRCUIT INSPECTION
PROCEDURE
While there are various electrical circuit inspection methods, de-
scribed here is a general method to check its open and short circuit
by using an ohmmeter and a voltmeter.
OPEN CIRCUIT CHECK
Possible causes for the open circuit are as follows. As the cause is
in the connector or terminal in many cases, they need to be checked
particularly carefully.

Loose connection of connector

Poor contact of terminal (due to dirt, corrosion or rust on it, poor
contact tension, entry of foreign object etc.)

Wire harness being open
When checking system circuits including an electronic control unit
such as ECM, TCM, ABS control module, etc., it is important to per-
form careful check, starting with items which are easier to check.
1) Disconnect negative cable from battery.
2) Check each connector at both ends of the circuit being checked
for loose connection. Also check lock condition of connector if
equipped with connector lock.
3) Using a test male terminal, check both terminals of the circuit be-
ing checked for contact tension of its female terminal.
Check each terminal visually for poor contact (possibly caused
by dirt, corrosion, rust entry of foreign object, etc.).
At the same time, check to make sure that each terminal is
locked in the connector fully.
4) Using continuity check or voltage check procedure described in
the following page, check the wire harness for open circuit and
poor connection with its terminals. Locate abnormality, if any.

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-13
2V voltage drop
Continuity Check
1) Measure resistance between connector terminals at both ends
of the circuit being checked (between A-1 and C-1 in the figure).
If no continuity is indicated (infinity or over limit), that means that
the circuit is open between terminals A-1 and C-1.
2) Disconnect the connector included in the circuit (connector-B in
the figure) and measure resistance between terminals A-1 and
B-1.
If no continuity is indicated, that means that the circuit is open
between terminals A-1 and B-1. If continuity is indicated, there
is an open circuit between terminals B-1 and C-1 or an ab-
normality in connector-B.
Voltage Check
If voltage is supplied to the circuit being checked, voltage check can
be used as circuit check.
1) With all connectors connected and voltage applied to the circuit
being checked, measure voltage between each terminal and
body ground.
If measurements were taken as shown in the figure at the left
and results were as listed below, it means that the circuit is open
between terminals B-1 and A-1.
Voltage Between:
C-1 and body ground: Approx. 5V
B-1 and body ground: Approx. 5V
A-1 and body ground: 0V
Also, if measured values were as listed below, it means that
there is a resistance (abnormality) of such level that corre-
sponds to the voltage drop in the circuit between terminals A-1
and B-1.
Voltage Between:
C-1 and body ground: Approx. 5V
B-1 and body ground: Approx. 5V
A-1 and body ground: Approx. 3V

YH4
GRAND
VITARA
0A-14 GENERAL INFORMATION
To other
parts
Other parts
To other
partsSHORT CIRCUIT CHECK (Wire harness to ground)
1) Disconnect negative cable from battery.
2) Disconnect connectors at both ends of the circuit to be checked.
NOTE:
If the circuit to be checked is connected to other parts, dis-
connect all connectors of those parts.
Otherwise, diagnosis will be misled.
3) Measure resistance between terminal at one end of circuit (A-1
terminal in figure) and body ground. If continuity is indicated, it
means that there is a short to ground between terminals A-1 and
C-1 of the circuit.
4) Disconnect the connector included in circuit (connector B) and
measure resistance between A-1 and body ground.
If continuity is indicated, it means that the circuit is shorted to the
ground between terminals A-1 and B-1.